import type { FillDataResponse, FillFieldData, FillFieldType } from '../domain/types';
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const FIELD_TYPES = new Set<FillFieldType>(['text', 'multiline', 'select', 'checkbox', 'date']);
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export class FillDataError extends Error {
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constructor(message: string, public readonly status?: number) {
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super(message);
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this.name = 'FillDataError';
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}
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}
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function isRecord(value: unknown): value is Record<string, unknown> {
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return typeof value === 'object' && value !== null && !Array.isArray(value);
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}
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export function parseFillData(raw: unknown): FillDataResponse {
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if (!isRecord(raw) || !isRecord(raw.fields)) throw new Error('填写数据格式无效');
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const fields: Record<string, FillFieldData> = {};
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for (const [tag, value] of Object.entries(raw.fields)) {
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if (!tag || !isRecord(value) || !FIELD_TYPES.has(value.type as FillFieldType)) throw new Error('填写数据格式无效');
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const type = value.type as FillFieldType;
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if (type === 'checkbox') {
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if (value.value !== null && typeof value.value !== 'boolean') throw new Error('填写数据格式无效');
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fields[tag] = { type, value: value.value ?? false };
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} else {
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if (value.value !== null && typeof value.value !== 'string') throw new Error('填写数据格式无效');
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fields[tag] = { type, value: value.value as null | string };
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}
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}
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return { fields };
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}
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function messageFor(status: number): string {
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if (status === 401) return '填写凭证已过期，请重新打开文档';
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if (status === 403) return '无权读取填写数据';
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if (status === 404) return '填写数据不存在';
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return '填写数据加载失败';
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}
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export async function fetchFillData(context: { apiBaseUrl: string; ticket: string }): Promise<FillDataResponse> {
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let response: Response;
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try {
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response = await fetch(`${context.apiBaseUrl}/api/eln/onlyoffice/template-fill/data`, {
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headers: { Authorization: `Ticket ${context.ticket}` },
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});
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} catch {
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throw new FillDataError('填写数据加载失败');
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}
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if (!response.ok) throw new FillDataError(messageFor(response.status), response.status);
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try {
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return parseFillData(await response.json());
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} catch (error) {
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if (error instanceof FillDataError) throw error;
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throw new FillDataError('填写数据格式无效');
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}
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}
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